具有盘/片状,棒/针状析出相铝合金的时效-屈服强度变化模型  

A Model for Age Strengthening of Al Alloys with Plate/Disc-like or Rod/Needle-like Precipitate

作　　者：刘刚[1] 张国君[1] 丁向东[1] 孙军[1] 陈康华[2] 

机构地区：[1]西安交通大学,陕西西安710049 [2]中南大学,湖南长沙410083

出　　处：《稀有金属材料与工程》2003年第12期971-975,共5页Rare Metal Materials and Engineering

基　　金：国家重点基础研究发展规划资助项目(G1999064900-9)

摘　　要：以析出热力学、长大动力学及强化理论为基础,研究了具有盘/片状、棒/针状析出相铝合金在时效过程中的析出相尺寸、体积分数变化及其对时效合金强化效果的影响,得到了合金成分、时效参数与组织参数、屈服强度间的解析关系式,进而从微观-宏观相结合的角度建立起了具有盘/片状、棒/针状析出相铝合金的时效工艺-屈服强度量化模型,并将该模型应用于6061合金和Al-Zn-Mg合金的时效性能预测,取得了较满意的结果。同时,详细讨论了析出相长径比对时效温度以及合金处理状况的依赖关系。An unified model is presented to establish the quantitative relations between yield strengths of aged Al alloys containing plate/disc-like or rod/needle-like precipitates and the sizes, volume percentages of precipitates, The nucleation, growth and coarse of the precipitates are integrated into the age-strengthening model based on some acceptable assumptions. The aging strengthening of AA6061 and an Al-Zn-Mg alloy has been satisfactorily simulated and predicted. Furthermore, the dependence of,aspect ratio of plate/disc-like or rod/needle-like precipitates on aging temperature and processing condition is discussed in detail.

关 键 词：铝合金 盘/片状析出相 棒/针状析出相 时效强化模型 屈服强度 

分 类 号：TG115.5[金属学及工艺—物理冶金]